Journal ArticleDOI
Ultrastructural and radiotracer studies of pore function in foraminifera
S. Leutenegger,H. J. Hansen +1 more
TLDR
Clusters of mitochondria have been observed close to the inner end of the pores in Nonionella stella, Globobulimina pacifica, Buliminella tenuata, Bolvina argentea, Loxostomum pseudobeyrichi, Cassidulinoides cornuta and Bolivina cf.Abstract:
Clusters of mitochondria have been observed close to the inner end of the pores in Nonionella stella, Globobulimina pacifica, Buliminella tenuata, Bolivina argentea, Loxostomum pseudobeyrichi, Cassidulinoides cornuta and Bolivina cf. subexcavata, pointing to a pore function of oxygen-uptake. The relationship between mitochondria and pores is most distinct in Buliminella tenuata, Bolivina argentea and L. pseudobeyrichi collected from a deep-water, low-oxygen environment. Amphistegina lobifera Larsen, 1976 readily took up 14CO2 through its pores, indicating a pore function related to the photosynthetic activities of its symbionts. 14C-labelled glucose did not pass through the pores in traceable amounts during a 2 h exposure time.read more
Citations
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Book
Ecology and Applications of Benthic Foraminifera
TL;DR: This book presents the ecological background required to explain how fossil forms are used in dating rocks and reconstructing past environmental features including changes of sea level and demonstrates how living foraminifera can be used to monitor modern-day environmental change.
Book
Modern Planktonic Foraminifera
TL;DR: This chapter discusses the taxonomy and Species Features of Spinose Planktonic Foraminifera, and the development of Symbiosis, Commensalism and Parasitism, as well as the relationships between Symbiont Morphology and Host Physiological Interactions.
Journal ArticleDOI
Microhabitats of benthic foraminifera within deep-sea sediments
TL;DR: In this article, an analysis of living (stained) benthic foraminifera within the upper 15 cm of deep-sea sediments, which reveals species-specific microhabitat preferences, with distinct morphological features found with epifaunal and infaunal species.
Book ChapterDOI
Oxygen minimum zone Benthos: Adaptation and community response to hypoxia
TL;DR: Mid-water oxygen minima intercept the continental margins along much of the eastern Pacific Ocean, off west Africa and in the Arabian Sea and Bay of Bengal, creating extensive stretches of sea floor exposed to permanent, severe oxygen depletion, and may preview the types of adaptations, species, and processes that will prevail with increasing hypoxia over ecological and evolution- ary time.
Journal ArticleDOI
Benthic foraminifera in oxygen-poor habitats
TL;DR: Present data from modern environments do not support the hypothesis that most dysoxic-su☐ic benthic foraminifers, regardless of their phylogeny, are characterized by a particular test morphology.
References
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Journal ArticleDOI
Vital effect on stable-isotope composition seen in foraminifera and coral skeletons
TL;DR: In situ 14C and 45Ca uptake experiments show that when photosynthesis increases, more light metabolic CO2 is incorporated in the skeleton, explaining the non-equilibrium isotopic compositions previously reported for hermatypic corals and associated benthonic foraminifera.
Journal ArticleDOI
Test morphology, organic layers and chamber formation of the planktonic foraminifer Globorotalia menardii (d'Orbigny)
Journal ArticleDOI
Foraminiferal ecology of Santa Monica Bay, California
TL;DR: In this article, bottom samples from shallow to deep water were collected in Santa Monica Bay, California and the distributions of both living and dead foraminifera were determined, and the majority of species living in the bay were found to have sharply restricted geographic and bathymetric ranges.
Journal ArticleDOI
Differentiation of protoplasm in nummulitidae (Foraminifera) from Elat, Red Sea
Lukas Hottinger,D. Dreher +1 more
TL;DR: The canal system in the shells of Operculina ammonoides and Heterostegina depressa d'Orbigny is interpreted as consisting of a system of invaginations of the cell wall determining the morphology of proximal parts of the pseudopods.
Related Papers (5)
Microhabitats of benthic foraminifera within deep-sea sediments
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